Venezuela continues to be highly dependent on the petroleum sector, accounting for roughly one-third of GDP, around 80% of export earnings, and over half of government operating revenues. Government revenue has also been bolstered by increased tax collection, which has surpassed its 2005 collection goal by almost 50%. Tax revenue is the primary source of non-oil revenue, which accounts for 53% of the 2006 budget. A disastrous two-month national oil strike from December 2002 to February 2003, temporarily halted economic activity. The economy remained in depression in 2003, declining by 9.2% after an 8.9% fall in 2002. Output recovered strongly in 2004-2005, aided by high oil prices and strong consumption growth. Venezuela continues to be an important source of crude oil for the US market. Both inflation and unemployment remain fundamental problems.